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(No Model.)

B. H. REMMERS & J. WILLIAMSON.

FILTER PRESS.

No. 338,553. Patented Mar. 23, 1886.

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NITED STATES PATENT OFFIcEe BERNHARD H. REMMERS AND JOHN WILLIAMSON, OFGLASGOYV, COUNTY OF LANARK, SCOTLAND.

FILTER-PRESS.

$FECIPICATION forming part of Letters Patent No. 338,553, dated March23, 1886.

Application filed January 27, 1886. Serial No. 189,965. (No model.)Patented in England September-7, 1885, No.10,570.

To all whom it may concern.-

Be it known that we, BERNHARD HEINRIOH REMMERS and JOHN XVILLIAMsoN,citizens of theUnited Kingdom of Great Britain and Ireland, residing atGlasgow, in the cou nty of Lanark, Scotland, have invented new anduseful Improvements in Filter-Presses; and we do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the manufacture or art to which itrelates to make and use the same.

The object of our invention is so to improve the construction offilter-presses that we may efl'ect more complete liXiviation of thecakes or sludge formed between the plates in filtering sugar-liquors orother substances through filter-presses. To that end we form upon eachplate of the filterpress, at or near the lower side, aprojecting snug orpiece, through which we bore two holes in such position that when theplates are fitted together in the press these holes form two continuousbut separate longitudinal water-ways or channels.

In each of the alternate plates of the press 6 g, numbers 1 3 5 '7, &c..we form a passage or port to connect the filter-space of the plate withone of the longitudinal water-ways, and in each of the other series ofalternate plates 6 g, numbers 2 4t 6 S, &c.,wein a similar manner formpassages or ports connecting the filterspaces of these plates with thesecond longitudinal water way. The two longitudinal channels terminatein the front plate of the 3 5 pressin two vertical passages or pi pes,towhich cocks or valves are fitted, and they discharge at the level of theupper sides of the plates or top of the press. By this arrangement thewash-water which is forced into the one longitudinal channel passesthrough the passagesor ports into the filter-spaces of the one series ofalternate plates, fills such spaces, passes through the cakes or sludgeand escapes by the passages or ports in the adjoining series of 5 platesto the other longitudinal channel. The heavy sweet water orliquor,whichtends tolie at the bottom or lower edges of the plates,and in theoutlet-channel, is carried forward and forced up the discharge pipe andoutlet in front of the lighter clear water which follows the firstwashing of the cakes. The orifices or channels which are providedforlixiviating under the existing arrangement at the top corners oftheplates are utilized for permitting the discharge of air.

In the drawings, Figures 1 and 2 are elevations of two adjoining platesof the improved filter-press. Fig. 3 is an elevation of the front plateof the press, and Fig. 4 is a longitudinal section of part of the press,the section being taken through the middle oftwo of the plates, and, asat the line X X in Fig. 3, through the front plate and the two adjoiningplates of the press.

The general form or construction of the press and of the plates may beof any of the usual types in common use, but differing therefrom asregards provision for lubricating, for which purpose there is formedupon each plate A A A, &C., of the press a snug or projection, a a o850., through which two holes are bored to form, when the plates are inposition in the press,twolongitudinal water ways or channels, I) c,terminating at the front plate, A, in two channels, I) c, or in pipesoutside thereof extending to the upper side or top of said plate.

In each of the alternate plates A A &c., a port, (Z, is formed,communicating with the filterspace on each side of theplate and theupper longitudinal channel, I), and in each of the alternate plates AA*, &c., a similarport, e, is formed, communicating between thefilterspaces on each side and the lower channel, 0. Pipes provided withstop-cocks or valves are connected to the Vertical channels I) c,and thewater forliXiviation is admitted through either of these channels, whilethe other channel serves for the outlet of the sweet water, thelixiviation being conducted, by preference, by using the channels b band 0 0 alternately for the admission of the wash-water, the waterentering the channel b I) passing through the series of ports (1 in theplates A A 810., into the filter-spaces through the cakes or sludgeformed therein and displaces the air, which is driven off through theportsf and the channels 9 at the top of the plates, and after passingthrough the cakes or sludge the wash-water passes out by the ports 0 inthe plates A A, &c., to the channels 0 c,which for the time being, formthe outlet. By forming the lixiviating-channels b c and thecommunicating ports d e at the lower side's or bottoms of the plates andconnecting them to the vertical channels I) c, as above described, theheavy sweet water,which tends to lie at the bottom and is 'not carriedoff by the wash-water in the ordinary arrangements for lixiviating, iscarried forward and forced up the discharge-pipe in advance of the clearwater.

In the snugs aa, 850., on the filter-plates recesses are formed,whereinto blocks of cork, rubber, or similar elastic material are fittedto project slightly above'thefaces of the plates, so that when theplates are pressed together 'water-tightj oints are formed between thesu ugs' 1. In a filter-press, the improved construction of thefilter-plates with snugs or projeco tions having lixiviating channels I)a formed therein, and ports dc, communicating between the filter-spacesand alternately with the upper and lower channel throughout the seriesof plates, vertical inlet and outlet channels or 3 5 pipes reaching tothe top of the press being provided, substantially as and forthe purposeset forth.

2. In a filter-press having lixiviating-channels formed in snugs 0rprojections on the 111- 40 ter-plates, forming recesses in said snugsand A fitting therein blocks of cork, rubber, or similar elasticmaterial, as and for the purpose set forth. t In witness whereof we havehereunto set our 5 hands and seals this 14th day of January, 1886.

B. H. REMMERS. L, s.] JOHN WILLIAMSON. [L. s.]

W itnesses it tel/1% GEO. M. ERUeKsHANK, \VALILAOE FAIRWEATHER, Fcls.Inst. 1 A., both of 135 Buchanan Street,

Glasgow.

